Paper-coating machine.



No. 704,434. Patented m 3, I902.

J. CHEVALIER & u. & E. LAJOIE.

PAPER COATING MACHINE.

(Application filed Jan. 31, 1902.)

(No Model.)

.lTF STATES PATENT OFFICE.

JOSEPH OHEVALIER, OF HOLYOKE, AND NAPOLEON LAJOIE AND EDVARD LAJOIE, OFOHICOPEE, MASSACHUSETTS.

PAPER-COATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 704,434, dated July 8,1902.

Application filed January 31, 1902. Serial No. 91,965. (No model.)

To (all whout it may concern.-

Be it known that we, J osnrn OHEVALIER, residing at Holyoke, andNAPOLEON LAJOIE and EDWARD LAJOIE, residing at Fairview, in the city ofChicopee, in the county of Hampden and State of Massachusetts, citizensof the United States of America, have jointly invented new and usefulImprovements in Paper-Ooatin g Machines, of which the following is aspecification. i This invention relates to paper-coating machines, andhas for its object the improvement in machines of this class whereby thecoating of material may be more uniformly applied to the paper andwhereby it may be more cheaply applied, the economy being effectedlargely by the provision of means for spreading the coating materialupon the paper without resorting to the usual method of working it ontothe surface of the paper by means of a number of brushes. These latterto produce an even surface free from lines must be made of fine materialand are very expensive and wear out rapidly, as they must be keptconstantly in motion to properly lay the coating material and toincorporate it' thoroughly into the surface of the paper to permit it towithstand the subsequent glazing operations.

The invention consists in the construction set forth in the followingspecification and clearly pointed out in the claims appended thereto.

Referring to the drawings forming part of this application, Figure l isa longitudinal sectional elevation of a machine embodying our invention.Fig. 2 is a plan view of the machine, certain parts of the frame beingbroken away.

Referring now to the drawings, a indicates the longitudinal frame partsof the machine, and b the posts thereof. The paper is run through themachine in a continuous web and is indicated by c. The roll of paperfrom which this web is drawn is not shown in the drawings, but issupported in any convenient manner at the rear of the machine, and thepaper is drawn therefrom and passes over a roll d, supported on the rearposts of the machine in a horizontal position. From thence it passesover the guide-roll e, supported on I paper and the surface of the roll.

arms secured to the front posts of the frame. In suitable bearings f,vertically adjustable on these front posts, there is a larger roll g,which constitutes one of the feed-rolls, the location thereof relativeto the guide-roll 6 being such that the paper runningfrom the latteronto said feed-roll will run in a substantially vertical plane and beguided into close contact with the feed-roll at a point substantiallyhorizontally opposite the axis of the latter. The second or auxiliaryfeed-roll is indicated by h and is located vertically over the roll g.This roll h is in fixed bearings; but the roll g may, as stated, beadjusted toward and from it. This may be done in any desirable way; butpreferably the bearings f thereof are formed in the lower end of twoarms i, adapted to slide vertically on or near the inner surface of thetwo front posts between which the roll is located, and on these armsthere is provided a rack j, with which gear wheels 70 engage, thesegears being mounted on a shaft extending across the machine, to which acrank or hand-wheel may be 7 5 fixed, whereby it may be rotated and theroll thus adjusted. Suitablepawls 7c,oneofwhich is shown in Fig. 1,serve to lock the gears, and thus hold the roll 9 in its adjustedposition. Below this roll 9 is a shallow pan mfor containing the liquidcoating material, the roll be ing so adjusted that its lower portionwill be submerged in said material. The web of paper thus passingthrough the coating material as it is drawn forward by said feed-roll, 85 the contact of said web with the surface of this roll extending abovethe surface of the coating material, the latter cannot come in contactwith that side of the web next to the roll. From said feed-roll g theweb is car- 0 ried up over the auxiliary roll h, and from thence it runsover the roll it at the rear of the machine, passing beyond to thedriers. By means to be described fartheron the said roll h is adjustedto rotate at a somewhat 5 greater speed than does the roll g to the endthat the paper may always be held tightly against the latter roll in.its passage through the coating material, whereby a uniform feed isassured and whereby the coating material zoo may be prevented fromentering between the Both the roll g and the auxiliary roll it are madeof brass with a highly-finished surface; but the guide-rolls may be ofwood or metal, as desired. The longitudinal frame members extend beyondthe front of the roll gsomewhat, and supported thereon is the roll 0-.The ends of the shaft on which this roll is fixed are supported inbearings-in the ends of two horizontally-adj ustable arms p,each ofwhich has a rack q thereon, with which pinions r engage, these beingsecured to a shaft 8, extending across the front end of the machine andprovided with a crank for rotating it. The roll 0 is of brass and isfaced with rubher or some similar yielding material and is provided witha wiper-roll 25. On one end of the roll 0 there is secured a pulley 1t,(shown in Fig. 2 and in dotted lines only in Fig. 1,) whereby the rollmay be rotated. As the machine is ordinarily used this roll is notrotated by a belt, but its face is set up against the feed-roll g, andas the latter revolves this roll 0 is revolved by reason of its contactwith the feed-roll. If it is desired to put a thick coating of materialon the web of paper, then the roll 0 is set to bear lightly against thefeed-roll; but if it is desired to put on a thinner coating then theroll is set up to bear with greater pressure against the feed-roll. Theface of the latter being of some yielding material, it is obvious'thatunder pressure the contacting surface thereof must flatten= .out more orless, and as the coating material adhering to the paper passes betweenthe feed-roll and this roll 0 it is kneaded into the surface of thepaper,and all surplus material is rolled back into the pan m. After thepaper emerges from between the rolls 9 and 0 it is run vertically up toand over the roll it and at the top of this latter roll passes under anendwise-reciprocating brush 4), whereby any inequalities in the coatingmaterial as applied by the roll 0 may be eliminated and the material begiven a uniform surface. There are many ways in which this reciproeatingbrush may be operated,but preferably the manner shown herein is adopted,and it consists in mounting a short shaft to in any suitable manner,whereby it may be supported substantially in the plane of the top of thebrush and transversely of the end of the latter. On this shaft at theopposite end of the brush there is mounted an eccentric, the strap ofwhich connects with a rod an, extending over the brush and having itsend pivotally secured thereto. On one end of the shaft 10 is a pulley y,by which the shaft is rotated.

For the purpose of adapting this machine to the various classes of workto which it may be applied it is necessary that the various rolls ofthemachine be provided with a driving mechanism whereby they may be rotatedat the different rates of speed required on different classes of work.To that end I construct a driving mechanism as follows: A maindriving-shaft z is provided, on which there is a suitable pulley 2,whereby it may be ro tated by a belt. This shaft is preferably supportedon the frame of the machine, as shown. In suitable bearings there arelocated at right angles to the driving-shaft two sets of cone-pulleys,(indicated by 3 and 4.). On the shafts of the driving-cones are beveledgears 5, engaging with similar gears 6 on the main shaft 2. On the endof said main shaft there is a pulley from which by a belt 7 movement istransmitted to the shaft w over the pulley y. The driving and drivencones are provided with the usual belt 8 and with a screw shipper-rod 9,whereby these belts may be shifted. On the end of the driven cone 3there is a pulley 10, from whichabelt runs over a pulley on theauxiliary feed-roll h, rotating the latter, and on the driven cone 4there is a pulley 11, from which a belt runs to a pulley on the roll g.Means are thus pro= vided for varying the speed of the roll 77. rela=tive to the roll 9. For the purpose of maintaining the proper tension onthe web of paper, whereby it may be held under as great a strain aspossible in passing around the roll g, the driving-cones for the tworolls 9 and hare so adjusted that the roll it will rotate at a somewhatgreater rate of speed than the roll g, thus maintaininga constant dragon the paper, which will keep it drawn tightly around the roll g.

There are certain classes of work which require a paper which hasapplied thereto only an exceedingly thin coating of material thereon,and it has been found in practice that this cannot be properly applied,however tightly the rollo may be set up against the roll g, if said roll0 is permitted to turn on its axis by the contact therewith of thefeed-roll; but to produce the desired effect the roll 0 must be firstadjusted to a proper contact with the feed-roll g and then be rotated ina direction contrary to that of the feed-roll, whereby the coatingmaterial may be rubbed into the paper in'an' exceedingly thin layer toproduce the desired effect and lay upon the paper what is known in theart as a skin-coat. To adapt the machine to this class of work, a secondpulley 12 is secured to the driving-cone 3 on the end thereof oppositeto the one on which the pulley 10 is secured, and from this pulley abelt runs to the pulley u on the roll 0. It is only when the roll 0 isused in this manner that the wiper-roll t is brought into service.direction, the wiper-roll may be lifted off from the roll 0 in the usualmanner.

Having thus described our invention, what We claim, and desire to secureby Letters Patent of the United States, is-

1. A paper-coating machine comprising two feed-rolls adapted to bepartially encircled by the paper located in separated relation one abovethe other; a receptacle for liquid coating material within which aportion of the lower feed-roll is immersed, means for adj usting saidlower feed-roll toward and from the When the roll 0 operates in thereverse upper roll, and means for rotating the latter at a higher rateof speed than the former; a roll having an adjustably yielding contactwith said lower roll, and means for rotating said upper feed-roll at ahigher rate of speed than the lower roll.

2. A'paper-coating machine comprising two feed-rolls adapted to bepartially encircled by the paper, a receptacle for the liquid coatingmaterial, one of said rolls being in contact with the latter, a rollhaving a yielding contact with the feed-roll running in the coatingmaterial, and adjustable relative thereto, means for rotating saidfeed-rolls at difierent rates of speed, and means for rotating said rollin contact with the feed-roll at diiferent rates of speed.

3. Apaper coating machine comprising two feed-rolls, and means forrotating them at different rates of speed, composed of separatecone-pulleys for driving each of said feedrolls, shiftable belts forsaid cone pulleys whereby the feed-rolls may be rotated at differentrates of speed, combined with a roll having a yielding contact with oneof said feed-rolls, and means for adjusting said roll relative to saidfeed-roll.

4:. A paper-coating machine comprising two feed-rolls adapted to bepartially encircled by the paper located in separated relation one abovethe other; a receptacle for liquid coating material within which aportion of the lower feed-roll is immersed, means for adjusting saidlower feed-roll toward and from the upper wiper-roll, and means forrotating the latter at a higher rate of speed than the former; a rollhaving an adjustably-yielding contact with said lower roll, means forrotating said wiper-"roll at a higher rate of speed than the lower roll,a brush bearing on said upper feed-roll, and means for impartingreciprocating movements to said brush, endwise.

JOSEPH OHEVALIER. NAPOLEON LAJOIE. EDWARD LAJOIE.

Witnessesi K. I. OnEMoNs', WM. H. OHAPIN.

